1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d11f377f8e19828bc9929ddf0423cc59fddc47a8c1684df4e6dfaa255c4b8e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81932051-f704-4a2b-af41-2220049a0596.json and https://artists.proofprofile.net/proofs/artist/81932051-f704-4a2b-af41-2220049a0596.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fa29b9d257bccc024670f0e70a697d6d031454b5e37384e12f0fc096455a43. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62350771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa613bab24d90669891376addea6c4ea1bfda11cfc8c92e47c621ce9f6787c4bc. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62410702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f518d1c75dce9378da752577fa95699d9c7c94bde3ccb6d5ff9c8666e7dd0f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:53:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62410703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c088fb2f04d65d87991a6327d178750bc0908c53a18fb5cb8dec245419d278. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIJ2483594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d99dd418b871c50da5a2518caa367f493e0dd32ee70c4121b97f69f81d11cf2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAII2437485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e20b7c8cd0c0fa9f9fac5f6faea5e216736a02a810b400dfd418fa6a383cc9c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZC62449632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f56fb7a807c4cb7f87fbc7d78d54cb053880fe8467af047634cd13e849b4b4. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJD2451874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acad24393fc5ac79554ea493f57ac2b2b3f139c558d877d7e551a5a8f11ba90. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJD2451849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3825a01547c342c06ca829b0160a194ce269b2d3686a61bde1e8004c5c77b24. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAJD2451932.